The recently trademarked, "Sonic Unleashed," has been revealed. Word is that a group of forum posters uncovered a bunch of unreleased media relating to the title on Sega's FTP site.
Judging from the screenshots alone, which were taken at 720p, the title is a prime candidate for a PlayStation 3 and Xbox 360 release. While official details are non-existent at this point, eXophase.com have reason to believe that Unleashed will retain the gameplay mechanics of classic Sonic titles with a combination of 2D and 3D graphics, aka 2.5D. Think Sonic Rivals, only without the racing sequences.
SEGA has yet to comment on the validity of the screenshots.